美与大脑
An old adage holds that beauty is in the eye of the beholder. The saying refers to the subjective nature of beauty. What one person finds beautiful might not appeal to someone else.
电网
You toss some bananas and milk into a blender. Then you plug it into the wall and press start. Soon, you have a delicious smoothie. While you’re sipping and scrolling through TikTok, you notice your phone’s battery is low. So you plug that into the wall and the battery charges.
植物如何影响人类发展
Next time you step outside, take a moment to notice all the plants. You may see a grassy lawn, weeds poking through the sidewalk, towering trees, moss growing on rocks or bricks, or maybe even a vegetable or flower garden. Now let this thought sink in: without plants, you and all the other human beings and animals on this planet couldn’t survive. We depend on plants for the air we breathe. But the relationship goes much deeper than that. We also rely on plants for food, clothing, medicines, materials, and so much more.
爵士乐时代
Just as you can write the history of the world using the biographies of the famous men and women who changed it (Confucius, Alexander the Great, Queen Elizabeth, Winston Churchill, etc.), you can tell the story of humankind by going from one great cultural center to another. Certain cities at certain moments have defined the course of the arts . Consider Xi’an in the Tang dynasty, Florence and Amsterdam in the Renaissance, London in the time of Shakespeare, or Vienna during the era of Mozart, Haydn, and Beethoven. In exactly this way, Paris during the Jazz Age was one of the most fun and one of the most important cities in the history of art, music, literature, and fashion.
大楼内的新型运载工具
At the end of the story Charlie and the Chocolate Factory by Roald Dahl, the eccentric inventor and candy – maker Willy Wonka takes young Charlie Bucket into a glass contraption that he calls a Wonkavator. It bursts through the roof of the factory and flies them out over the city. Willy Wonka says, An elevator can only go up and down, but the Wonkavator can go sideways, and slantways, and longways, and backways, and squareways, and frontways, and any other ways that you can think of.
小型堆：小身材大能量
The next big thing in nuclear energy is small. Designs for dozens of small modular reactors have been developed or are in progress . And a few small reactors are already operating in India, Pakistan, Russia, and elsewhere. A small modular reactor can produce up to 300 megawatts (MW) of electricity (many designs produce much less). But size isn’t the only thing that makes these new, advanced reactor designs stand out.
制造新型人体器官
The human body works like a machine. Over time, its parts wear out or get damaged. For example, disease may weaken the heart or a bone may break. When the body cannot heal itself, a doctor may repair or replace diseased or broken parts to keep the body running smoothly. Sometimes, a living or dead human donor provides a part. Donations of hearts, lungs, kidneys, bone marrow, blood, and other tissues regularly save lives. But getting new parts from other human beings isn’t the only way to accomplish this.
毕加索
Whenever the word “genius” is used, a small but magnificent group of names usually follows . Leonardo da Vinci and Michelangelo, Rembrandt and Raphael, Beethoven and Mozart are the automatic choices . For the modern era, two giants stand above all others: Albert Einstein and Pablo Picasso . They are in so many ways connected, especially because both of them redefined the way we consider the world we live in and both of them had brilliant new concepts of space. For Einstein, it meant the universe and man’s place in it were suddenly better known. For Picasso, the breakthrough was cubism, a way of looking at objects in space that was completely unlike any artistic vision before.
零废弃生活
Have you ever considered what the world would look like without waste? A world free from garbage dumps, landfills and pollution? For some people, this may feel like a pipe dream given the era of consumerism and throwaway products that we live in. For others, there is great ambition and hope as the world is starting to respond to the global rise in waste, offering possible ways to address this challenge.